WO2013166867A1

WO2013166867A1 - Frequency spectrum spreading method and device of wireless local area network

Info

Publication number: WO2013166867A1
Application number: PCT/CN2013/070972
Authority: WO
Inventors: 朱新林; 张明; 韩喆; 林建森
Original assignee: 华为技术有限公司
Priority date: 2012-05-08
Filing date: 2013-01-25
Publication date: 2013-11-14
Also published as: CN102655686A; CN102655686B

Abstract

The present invention provides a frequency spectrum spreading method and device of a wireless local area network (WLAN). The method comprises: determining a frequency band used by a WLAN, the frequency band being a 2.4G frequency band or comprising a 2.4G frequency band and a commercial frequency band; when the frequency band is the 2.4G frequency band, selecting at least four channels not interfering with each other, or, when the frequency band comprises the 2.4G frequency band and the commercial frequency band, selecting at least one channel not interfering with each other; and determining the selected channel as a WLAN channel for providing WLAN services. According to embodiments of the present invention, more WLAN channels not interfering with each other can be supported simultaneously.

Description

WLAN spectrum expansion method and device

This application is submitted to the Chinese Patent Office on May 8, 2012, and the application number is

The priority of the Chinese Patent Application, which is incorporated herein by reference.

TECHNICAL FIELD The present invention relates to wireless communication technologies, and in particular, to a frequency extension method and device for a wireless local area network. Background technique

A Wireless Local Area Network (WLAN) provides a high-speed data connection within a certain range. The channel division of WLAN in the 2.4 GHz band in China is as follows: The operating frequency range is 2400 2483.5 MHz, which is an industrial scientific medical (ISM) band that is not required to be applied; divided into 13 channels, each channel can occupy bandwidth 22MHz. However, only three of the 13 channels do not interfere with each other, such as channel 1, channel 6, and channel 11. Summary of the invention

Embodiments of the present invention provide a spectrum expansion method and device for a wireless local area network, which are used to expand

The range of spectrum that can be simultaneously supported in WLAN technology applications.

An embodiment of the present invention provides a frequency extension method for a wireless local area network, including:

Determining the frequency band used by the WLAN, which is in the 2.4G band or includes the 2.4G band and the commercial band;

When the frequency band is a 2.4G frequency band, at least four channels that do not interfere with each other are selected, or when the frequency band is a 2.4G frequency band and a commercial frequency band, at least one channel that does not interfere with each other is selected;

The selected channel is determined as a WLAN channel providing WLAN service.

An embodiment of the present invention provides a frequency extension device for a wireless local area network, including:

a determining module, configured to determine a frequency band used by the WLAN, wherein the frequency band is a 2.4G frequency band or a packet Including the 2.4G frequency band and the commercial frequency band;

a selection module, configured to select at least four channels that do not interfere with each other when the frequency band is a 2.4G frequency band, or select at least one channel that does not interfere with each other when the frequency band is a 2.4G frequency band and a commercial frequency band ;

And a configuration module, configured to determine the selected channel as a WLAN channel that provides WLAN service. According to the foregoing technical solution, the method for selecting a channel in the embodiment of the present invention can enable the channel information of the WLAN to support at least four WLAN channels that do not interfere with each other in the 2.4 GHz band, or to enable the used frequency band. The WLAN channel can support non-interference, and the number of channels that do not interfere with each other can be increased in the existing 2.4 GHz band. Alternatively, the WLAN channel can be set in the commercial frequency band to improve the spectrum range of the WLAN technology application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic flowchart of an embodiment of a method for expanding a frequency of a wireless local area network according to an embodiment of the present invention; FIG. 2 is a schematic diagram of an embodiment of a channel configuration according to an embodiment of the present invention;

3 is a schematic diagram of a power spectrum of a channel corresponding to FIG. 2;

4 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention; FIG.

6 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of an embodiment of a frequency local extension device of a wireless local area network according to the present invention. 1 is a schematic flowchart of an embodiment of a method for extending a frequency of a wireless local area network according to an embodiment of the present invention, including: Step 11: A device in a WLAN determines a frequency band used by a WLAN, and the frequency band is a 2.4G frequency band or includes a 2.4G frequency band. And commercial frequency bands;

Step 12: When the frequency band is 2.4G frequency band, the device in the WLAN selects at least four channels that do not interfere with each other, or when the frequency band is 2.4G frequency band and the commercial frequency band, select at least one mutual interference. Channel;

Step 13: The device in the WLAN determines the selected channel as the WLAN channel providing the WLAN service. The device in the WLAN may be an Access Point (AP) or an Access Controller (AC), a WLAN terminal, or any device using WLAN technology.

In order to implement the application spectrum range of the WLAN, four specific implementation manners are given in the embodiments of the present invention, namely:

Method 1: In the 2.4GHz band (that is, 2400MHz~2500MHz), configure at least 4 channels that do not interfere with each other.

Since the method increases the number of configurable channels that do not interfere with each other with respect to the existing WLAN standard configuration (the prior art is three mutually non-interfering channels), the working spectrum of the WLAN system can be extended, and the working frequency range is unchanged ( When using 2400MHz~2500MHz), improve the efficiency of frequency speech.

Optionally, in this mode, a channel with a bandwidth of 22 MHz (which may be referred to as channel 14) is added at a frequency of 2484 MHz, and does not interfere with the existing channels 1, 6, and 11.

The existing WLAN has a working range of 2400MHz~2483.5MHz in the 2.4G frequency band. In this working range, not only WLAN devices can be used, but other non-WLAN devices, such as Bluetooth devices, cordless phones, Zigbee, remote control devices, video surveillance, etc. It can also be used, then these non-WLAN devices can cause out-of-system interference to WLAN devices.

In this embodiment, by adding a channel that does not interfere with the existing channel in the 2.4 GHz band, the application range of the WLAN device is extended, and the interference caused by the non-WLAN device to the WLAN device can be reduced.

Manner 2: The four channels obtained by mode 1 are frequency-shifted, and the spacing between the four channels is kept constant during the frequency shift, and the frequency shift range is 2300 MHz to 2600 MHz.

Manner 3: Mirroring the obtained four channels of mode one, frequency shifting the four channels after mirroring, maintaining the spacing between the four channels during the frequency shift, and the frequency shift range is from 2300 MHz to 2600 MHz. _o

Mode 2 and Mode 3 belong to the commercially available frequency band in the 2.4 GHz band and adjacent to it, and at least 4 channels that do not interfere with each other are configured. Mode 2 and Mode 3 are also in the same range of the working frequency range. The number of mutually configurable channels that do not interfere with each other is increased, the operating frequency of the system can be extended, and the spectrum utilization efficiency is improved under the premise that the working frequency range is constant; in addition, since the 2.4 GHz band is free, channel planning The lack of regulation will adversely affect the stability of the WLAN, while the second and third modes can use the commercial frequency band adjacent to it, which can improve the stability to some extent. Method 4: Configure channels that do not interfere with each other in the commercial frequency band.

The number of mutually non-interfering channels configured in the used frequency band may be at least one. Configuring the WLAN channel in the frequency band can also expand the working spectrum of the WLAN to mitigate interference in the WLAN system. In addition, since the commercial frequency band can be effectively managed by the operator, the WLAN channel can be planned in the commercial frequency band. A non-interfering, stable WLAN commercial network.

The specific implementation of the above four methods can be seen in the following.

method one:

In order to better understand the embodiments of the present invention, some provisions of the prior art are first described. First, the relevant regulations for WLAN in the 2.4 GHz band are as follows:

(1) The spectrum range actually supported by the WLAN in the 2.4 GHz band is 2400 ΜΗζ to 2497 ΜΗζ, which means that the actual supported bandwidth of 2.4 GHz is 97 MHz.

(2) The channel frequency plan of the WLAN in the 2.4 GHz band is as follows: The band can include 14 channels, and the center frequency of each channel is: 2412MHz, 2417MHz, 2422MHz, 2427MHz, 2432MHz, 2437MHz, 2442MHz, 2447MHz , 2452MHz, 2457MHz, 2462MHz, 2467MHz, 2472MHz and 2484MHz.

Secondly, the WLAN 22MHz channel power spectral density template indicates that if the adjacent two channels do not interfere with each other, the out-of-channel interference of the required channel is less than or equal to -20dB in the passband interval of the channel -11ΜΗζ~11MHz.

China currently uses the first 13 channels in the above channel plan, and the bandwidth of each channel is

22MHz. The channels that do not interfere with each other are channel 1, channel 6 and channel 11 respectively; the center frequency of channel 1 is 2412 MHz, the frequency range is 2401 MHz ~ 2423 MHz; the center frequency of channel 6 is 2437 MHz, and the spectrum range is 2426 MHz ~ 2448 MHz. The center frequency of channel 11 is 2462MHz, and the spectrum range is 2451 MHz ~ 2473MHz.

Channel 1, channel 6, and channel 11 occupy a total bandwidth of 2473-2401 = 72 MHz, but the bandwidth actually supported by the WLAN in the 2.4 GHz band is 97 MHz, then, on the right side of channel 11 (ie, greater than channel 11) Frequency range) It is possible to add a 22MHz channel.

Referring to FIG. 2, the newly added channel in this embodiment is channel 14, the center frequency of channel 14 is 2484 MHz, and the spectrum range is 2473 MHz to 2495 MHz. Since the maximum frequency of the channel 14 is 2495 MHz, it does not exceed the prior art 2497 MHz range; the center frequency of the channel 14 is 2484MHz, in line with the prior art plan for channel frequency.

In addition, referring to FIG. 3, the interference situation of the four channels (channel 1, channel 6, channel 11, and channel 14) in this embodiment indicates that: the out-of-channel interference of any one of the above four channels is less than or equal to - 20dB, that is, the above four channels are channels that do not interfere with each other.

Therefore, the channel 1, the channel 6, the channel 11, and the channel 14 configured in this embodiment comply with the channel planning conditions and are also mutually non-interfering conditions, and are four mutually non-interfering channels that can be simultaneously supported.

Method 2:

Referring to FIG. 4, in this embodiment, the center frequency spacing structure of the channel 1, the channel 6, the channel 11, and the channel 14 is kept unchanged to the right by 25 MHz, and the moved channel, that is, the four channels configured in this embodiment are respectively:

Channel Γ : The center frequency is 2437MHz and the bandwidth is 22MHz (that is , the frequency range is 2426~2448MHz ) ;

Channel 6, the center frequency is 2462MHz and the bandwidth is 22MHz (that is, the frequency range is 2451 - 2473MHz);

Channel 1 Γ : The center frequency is 2487MHz and the bandwidth is 22MHz (that is, the frequency range is

2476~2498MHz);

Channel 14 ': The center frequency is 2509MHz and the bandwidth is 22MHz (that is, the frequency range is 2498~2520MHz).

It can be understood that the movement mode shown in Fig. 4 is only an example, and other distances and/or directions can be moved in the range of 2300~2600MHz.

Method three:

Referring to FIG. 5, in this embodiment, the center frequency spacing structure of channel 1, channel 6, channel 11, and channel 14 is kept unchanged for mirror mapping, and the four channel center frequency spacing structures after mirror mapping are kept unchanged to the left. 25MHz, the mobile channel, that is, the four channels configured in this embodiment are:

Channel 1 " : The center frequency is 2459MHz and the bandwidth is 22MHz (that is , the frequency range is 2448~2470MHz ) ;

Channel 6 " : The center frequency is 2434MHz and the bandwidth is 22MHz (that is , the frequency range is 2423~2445MHz ) ;

Channel 11 " : The center frequency is 2409MHz and the bandwidth is 22MHz (that is, the frequency range is 2398~2420MHz) ;

Channel 14": The center frequency is 2387MHz and the bandwidth is 22MHz (that is, the frequency range is 2376~2398MHz).

It can be understood that the movement mode shown in FIG. 5 is only an example, and other movement modes may exist in the range of 2300 to 2600 MHz.

Method 4:

In this mode, the minimum spacing of the center frequency of the adjacent channel is f _mm , and the bandwidth of the channel is B. In this embodiment, f _mm >B is required. In this embodiment, the channel bandwidth B is 22 MHz, and the center frequency point spacing is 25 MHz.

Referring to Figure 6, the configuration in the commercial band of 2300~2400MHz is taken as an example. The four channels that do not interfere with each other are:

Channel A: The center frequency is 2312MHz, and the bandwidth is 22MHz (that is, the frequency range is: 2301~2323MHz);

Channel B: The center frequency is 2337MHz and the bandwidth is 22MHz (that is, the frequency range is: 2326~2348MHz)

Channel C: The center frequency is 2362MHz and the bandwidth is 22MHz (that is, the frequency range is: 2351~2373MHz)

Channel D: The center frequency is 2387MHz and the bandwidth is 22MHz (that is, the spectrum range is: 2376~2398MHz)

Referring to Figure 7, the configuration in the commercial frequency band of 2500~2600MHz is taken as an example. The four channels that do not interfere with each other are:

Channel E: The center frequency is 2512MHz, and the bandwidth is 22MHz (that is, the spectrum range is: 2501~2523MHz);

Channel F: The center frequency is 2537MHz and the bandwidth is 22MHz (that is, the frequency range is: 2526~2548MHz)

Channel G: The center frequency is 2562MHz and the bandwidth is 22MHz (that is, the frequency range is: 2551~2573MHz)

Channel H: The center frequency is 2587MHz and the bandwidth is 22MHz (that is, the frequency range is: 2576~2598MHz).

FIG. 8 is a schematic structural diagram of an embodiment of a frequency local extension device of a wireless local area network according to the present invention; The device can be an AP, an AC, a WLAN terminal, or any device that uses the WLAN technology, and the device includes a determining module 81, a selecting module 82, and a configuration module 83. The determining module 81 is configured to determine a frequency band used by the WLAN, where the frequency band is The 2.4G frequency band includes the 2.4G frequency band and the commercial frequency band; the selection module 82 is configured to select at least four channels that do not interfere with each other when the frequency band is the 2.4G frequency band, or when the frequency band is the 2.4G frequency band and In the commercial frequency band, at least one channel that does not interfere with each other is selected; the configuration module 83 is configured to determine the selected channel as a WLAN channel providing WLAN service.

Optionally, the selecting module is specifically configured to:

In the 2.4 GHz band, at least 4 channels are selected, wherein the interval between the center frequencies of any two adjacent channels is at least the bandwidth of the channel.

Optionally, the selecting module is specifically configured to:

Selecting channels that do not interfere with each other in the 2.4 GHz band and in the commercial band adjacent to the 2.4 GHz band; or

In a commercially available frequency band, select channels that do not interfere with each other.

Optionally, the selecting module is specifically configured to:

Select channel 1, channel 6, channel 11, channel 14 as four mutually non-interfering

WLAN channel, where channel 1 refers to a channel with a center frequency of 2412 MHz and a bandwidth of 22 MHz, channel 6 refers to a channel with a center frequency of 2437 MHz and a bandwidth of 22 MHz, and channel 11 refers to a center frequency of 2462 MHz. For a channel with a width of 22 MHz, channel 14 refers to a channel with a center frequency of 2484 MHz and a bandwidth of 22 MHz.

Optionally, the selecting module is specifically configured to:

Channel Γ, channel 6 ′, channel 1 Γ and channel 14 ′ are selected as four mutually non-interfering WLAN channels supported simultaneously, where channel Γ, channel 6 ′, channel 1 Γ and channel 14 ′ are channel 1 and channel 6 , channel 11, channel 14 in the range of 2300MHz and 2600MHz, keeping the center frequency spacing structure unchanged, and shifting any bandwidth to the left or right; or

Channel 1", channel 6", channel 11" and channel 14" are selected as four mutually non-interfering WLAN channels supported simultaneously, where channel 1", channel 6", channel 11" and channel 14" are channel 1. After the mirroring is performed on the channel 6, the channel 11, and the channel 14, the four channels after the mirroring are in the range of 2300 MHz and 2600 MHz, and the center frequency spacing structure is kept unchanged, and the bandwidth is shifted to the left or right by an arbitrary bandwidth;

Channel 1 refers to a channel with a center frequency of 2412 MHz and a bandwidth of 22 MHz. Channel 6 It refers to a channel with a center frequency of 2437MHz and a bandwidth of 22MHz. Channel 11 refers to a channel with a center frequency of 2462MHz and a bandwidth of 22MHz. Channel 14 refers to a channel with a center frequency of 2484MHz and a bandwidth of 22MHz.

Optionally, the selecting module is specifically configured to:

Selecting at least one channel as a mutually supported non-interfering channel in a frequency band that has been commercialized, wherein any two adjacent channels of the at least two channels are selected when the selected channel is at least two The interval between the center frequency points is at least the bandwidth of the channel.

Optionally, the selecting module is specifically configured to select four channels as follows:

The center frequency is 2312MHz, the channel with a bandwidth of 22MHz, the center frequency is 2337MHz, the channel with a bandwidth of 22MHz, the center frequency is 262MHz, the channel with a bandwidth of 22MHz, and the center frequency is 2387MHz, the bandwidth Is a 22MHz channel; or,

The center frequency is 2512MHz, the bandwidth is 22MHz, the center frequency is 2537MHz, the bandwidth is 22MHz, the center frequency is 2562MHz, the bandwidth is 22MHz, and the center frequency is 2587MHz. The bandwidth is 22MHz channel.

In this embodiment, the spectrum range of the WLAN technology application can be improved, and the frequency utilization rate can be improved under the premise that the working frequency range is constant.

One of ordinary skill in the art will appreciate that all or a portion of the steps to implement the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A wireless local area network frequency extension method, characterized by including:

Determine the frequency band used by the wireless local area network WLAN, which is the 2.4G frequency band or includes the 2.4G frequency band and commercial frequency bands;

When the frequency band is the 2.4G frequency band, select at least 4 channels that do not interfere with each other, or, when the frequency band is the 2.4G frequency band and a commercial frequency band, select at least 1 channel that does not interfere with each other;

Determine the selected channel as the WLAN channel that provides WLAN services.

2. The method according to claim 1, characterized in that when the frequency band is the 2.4G frequency band, at least 4 channels that do not interfere with each other are selected, including:

In the 2.4GHz frequency band, select at least 4 channels, where the distance between the center frequencies of any two adjacent channels is at least the bandwidth of the channel.

3. The method according to claim 1, characterized in that when the frequency band is the 2.4G frequency band and a commercial frequency band, select at least one channel that does not interfere with each other, including:

In the 2.4GHz frequency band and in the commercial frequency band adjacent to the 2.4GHz frequency band, select channels that do not interfere with each other; or,

Within commercial frequency bands, choose channels that do not interfere with each other.

4. The method according to claim 2, characterized in that, in the 2.4GHz frequency band, at least 4 channels are selected, including:

Select channel 1, channel 6, channel 11, and channel 14 as four channels that do not interfere with each other and support each other at the same time. Among them, channel 1 refers to the channel with a center frequency of 2412MHz and a bandwidth of 22MHz. Channel 6 refers to the center frequency. Channel 11 is a channel with a center frequency of 2437MHz and a bandwidth of 22MHz. Channel 11 is a channel with a center frequency of 2462MHz and a bandwidth of 22MHz. Channel 14 is a channel with a center frequency of 2484MHz and a bandwidth of 22MHz.

5. The method according to claim 3, wherein selecting channels that do not interfere with each other in the 2.4 GHz frequency band and the commercial frequency band adjacent to the 2.4 GHz frequency band includes: selecting channel Γ , channel 6', channel 1 Γ and channel 14' are four channels that do not interfere with each other at the same time. Among them, channel Γ, channel 6', channel 1 Γ and channel 14' are channel 1, channel 6, channel 11, Channel 14 is within the range of 2300MHz and 2600MHz, keeping the center frequency spacing structure unchanged, and shifting any bandwidth to the left or right. Channel 1 means that the center frequency is 2412MHz. A channel with a bandwidth of 22MHz. Channel 6 refers to a channel with a center frequency of 2437MHz and a bandwidth of 22MHz. Channel 11 refers to a channel with a center frequency of 2462MHz and a bandwidth of 22MHz. Channel 14 refers to a channel with a center frequency of 2484MHz. , a channel with a bandwidth of 22MHz.

6. The method according to claim 3, characterized in that, selecting channels that do not interfere with each other in the 2.4 GHz frequency band and the commercial frequency band adjacent to the 2.4 GHz frequency band includes: selecting channel 1 ", Channel 6", Channel 11" and Channel 14" are four channels that do not interfere with each other at the same time. Among them, Channel 1", Channel 6", Channel 11" and Channel 14" are Channel 1, Channel 6 and Channel 14". 11. After channel 14 is mirrored, the four mirrored channels are obtained by keeping the center frequency interval structure unchanged within the range of 2300MHz and 2600MHz, and shifting any bandwidth to the left or right. Channel 1 refers to The center frequency is 2412MHz and the bandwidth is 22MHz. Channel 6 refers to the center frequency is 2437MHz and the bandwidth is 22MHz. Channel 11 refers to the center frequency is 2462MHz and the bandwidth is 22MHz. Channel 14 is Refers to the channel with a center frequency of 2484MHz and a bandwidth of 22MHz.

7. The method according to claim 3, characterized in that selecting channels that do not interfere with each other within a commercially available frequency band includes:

Within the commercially available frequency band, select at least 1 channel as a channel that supports each other at the same time and does not interfere with each other. When at least 2 channels are selected, the distance between any two adjacent channels among the at least 2 channels is The spacing between center frequency points is at least the bandwidth of the channel.

8. The method according to any one of claims 3 to 7, characterized in that the commercially available frequency band is: 2300MHz~2400MHz, and/or 2500MHz~2600MHz.

9. The method according to claim 7, characterized in that the selected at least 1 channel is:

A channel with a center frequency of 2312MHz and a bandwidth of 22MHz, a channel with a center frequency of 2337MHz and a bandwidth of 22MHz, a channel with a center frequency of 2362MHz and a bandwidth of 22MHz, and a channel with a center frequency of 2387MHz and a bandwidth of 22MHz channel; or,

A channel with a center frequency of 2512MHz and a bandwidth of 22MHz, a channel with a center frequency of 2537MHz and a bandwidth of 22MHz, a channel with a center frequency of 2562MHz and a bandwidth of 22MHz, and a channel with a center frequency of 2587MHz and a bandwidth of 22MHz channel.

10. A wireless local area network frequency expansion device, characterized by: including:

Determination module, used to determine the frequency band used by the wireless local area network WLAN, the frequency band is 2.4G Frequency bands may include 2.4G frequency bands and commercial frequency bands;

A selection module configured to select at least 4 channels that do not interfere with each other when the frequency band is the 2.4G frequency band, or to select at least 1 channel that does not interfere with each other when the frequency band is the 2.4G frequency band and a commercial frequency band. ;

The configuration module is used to determine the selected channel as a WLAN channel that provides WLAN services.

11. The device according to claim 10, characterized in that the selection module is specifically used to: select at least 4 channels in the 2.4GHz frequency band, wherein, between the center frequency points of any two adjacent channels The interval is at least the bandwidth of the channel.

12. The device according to claim 10, characterized in that the selection module is specifically configured to: select channels that do not interfere with each other in the 2.4GHz frequency band and in commercial frequency bands adjacent to the 2.4GHz frequency band. ; or,

13. The device according to claim 11, characterized in that the selection module is specifically configured to: select channel 1, channel 6, channel 11, and channel 14 as four channels that are supported simultaneously and do not interfere with each other, wherein, channel 1 refers to the channel with a center frequency of 2412MHz and a bandwidth of 22MHz. Channel 6 refers to a channel with a center frequency of 2437MHz and a bandwidth of 22MHz. Channel 11 refers to a channel with a center frequency of 2462MHz and a bandwidth of 22MHz. Channel 14 refers to the channel with a center frequency of 2484MHz and a bandwidth of 22MHz.

14. The device according to claim 12, characterized in that the selection module is specifically configured to: select channel Γ, channel 6', channel 1 Γ and channel 14' as four channels that are supported simultaneously and do not interfere with each other, Among them, channel Γ, channel 6', channel 1 Γ and channel 14' are channel 1, channel 6, channel 11, and channel 14. Within the range of 2300MHz and 2600MHz, the center frequency point spacing structure remains unchanged, and the center frequency point spacing structure remains unchanged, and is shifted to the left or right. Obtained after arbitrary bandwidth; or,

Select channel 1", channel 6", channel 11" and channel 14" as the four channels that are supported at the same time and do not interfere with each other. Among them, channel 1", channel 6", channel 11" and channel 14" are channel 1, channel 6. After channel 11 and channel 14 are mirrored, the four mirrored channels are obtained by shifting any bandwidth to the left or right while keeping the center frequency interval structure unchanged within the range of 2300MHz and 2600MHz;

Among them, channel 1 refers to the channel with a center frequency of 2412MHz and a bandwidth of 22MHz, channel 6 refers to a channel with a center frequency of 2437MHz and a bandwidth of 22MHz, and channel 11 refers to a channel with a center frequency of 2437MHz. 2462MHz, a channel with a bandwidth of 22MHz. Channel 14 refers to a channel with a center frequency of 2484MHz and a bandwidth of 22MHz.

15. The device according to claim 12, characterized in that the selection module is specifically configured to: select at least one channel as a channel that simultaneously supports each other and does not interfere with each other in a commercially available frequency band, wherein, in the selected When there are at least two channels, the distance between the center frequency points of any two adjacent channels among the at least two channels is at least the bandwidth of the channel.

16. The device according to claim 15, characterized in that the selection module is specifically used to select the following 4 channels:

A channel with a center frequency of 2512MHz and a bandwidth of 22MHz, a channel with a center frequency of 2537MHz and a bandwidth of 22MHz, a channel with a center frequency of 2562MHz and a bandwidth of 22MHz, and a channel with a center frequency of 2587MHz and a bandwidth of 22MHz. 22MHz channel.